The document provides an overview of key concepts related to constitutional law in the Philippines. It begins by defining what a constitution is and its purposes in establishing a framework for government. It then discusses principles of constitutional construction, specifically verba legis which refers to interpreting words in their ordinary meaning. It also covers the 1987 Philippine Constitution, noting it established a democratic government with separation of church and state. It concludes by discussing the preamble which sets out the origins and purposes of the constitution. The document provides essential background information on the nature and role of constitutions according to Philippine law.